CN212375686U - Novel long-span inclined leg support type steel truss inverted arch bridge - Google Patents
Novel long-span inclined leg support type steel truss inverted arch bridge Download PDFInfo
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- CN212375686U CN212375686U CN202020483030.3U CN202020483030U CN212375686U CN 212375686 U CN212375686 U CN 212375686U CN 202020483030 U CN202020483030 U CN 202020483030U CN 212375686 U CN212375686 U CN 212375686U
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Abstract
The utility model relates to a novel stride oblique leg props anti-bridge that encircles of formula steel purlin greatly, including bridging system, steel purlin anti-system and decking, steel purlin anti-system of encircleing is installed on a set of bridging system, steel purlin anti-system of encircleing includes steel purlin owner and encircles piece and steel crossbeam, connects through the steel crossbeam between the steel purlin owner encircles the piece, installs the decking on steel purlin anti-system of encircleing. This novel long-span inclined leg props formula steel purlin anti-arch bridge adopts steel construction and concrete structure perfect adaptation, and main bridge span structure is steel purlin anti-arch structure system, and its outward appearance is succinct novel, and structural performance is good, and the bridge floor field of vision is unobstructed, under certain geology, topography condition, is a novel bridge that has structure atress demand and view effect concurrently, has antisymmetric beautiful, has broken the restriction of conventional bridge in the past.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, concretely relates to novel anti-arch bridge of oblique leg brace formula steel purlin strides greatly.
Background
The traditional inverted arch-shaped deck suspension bridge mainly comprises a bridge deck, a main beam, upright posts and main cables, wherein the main cables are main bearing members. Due to the structural characteristics and the stability requirement, the device is suitable for mountainous canyons with small span or rivers with large water fall and low navigation requirement, and has high requirement on the terrain. The inverted arch-shaped through-head suspension bridge has small integral rigidity and poor wind resistance stability, cannot be suitable for larger span and has limitation.
Traditional oblique leg rigid frame bridge adopts the type that oblique leg and girder concretion come support bridge structures, and the girder generally adopts concrete box girder structure, and the structure dead weight is great, has great moment of flexure and axial force under the dead weight effect of main bore especially, and too big weight is unfavorable to the girder structure, also can increase the axial force and the moment of flexure of oblique leg.
The traditional steel truss arch bridge is an arch bridge formed by a solid web section in the middle and arch truss pieces on two sides, wherein the truss arch pieces are main bearing structures and comprise an upper chord member, a lower chord member, a web member and a solid web section. Although the steel truss arch bridge has good integrity, the truss rod piece is fine, the template is complex, the requirements for solid section concrete pouring and hoisting are high, and cracks are easily generated at the bending part and the rigid joint of the truss.
The traditional steel truss composite beam is of a space structure consisting of a main truss, a horizontal longitudinal connection, a transverse connection and a bridge deck, except that a large-span steel truss composite beam fulcrum is arranged to be an altitude-variable space truss, common trusses are designed according to equal heights, the equal height girders meet aesthetic requirements, but the overall deflection of the structure is large due to large common bending moment during spanning, large stress of a chord member and the bridge deck, and the integral performance of the structure is improved by adopting the altitude-variable main truss according to a bending moment envelope diagram.
The novel large-span inclined leg support type steel truss inverted arch bridge integrates the structural advantages of a suspension bridge, an arch bridge, a rigid frame bridge and a combination beam by using the stress mode and the characteristics of a steel truss combination beam as reference, forms an inverted arch shape by reversely establishing an arch-shaped variable cross-section steel truss combination beam, takes a main arch stress system formed by steel truss chords as a main bridge span stress structure, can exert the structural stress advantage and the high-strength material advantage, avoids the defect that the traditional truss arch bridge occupies the bridge floor space, and particularly has the distinct characteristic at a special bridge position.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a novel stride oblique leg props anti-arched bridge of formula steel purlin greatly utilizes the steel truss owner to encircle as the main structure of striding, and its dead weight is less, and suitable anti-arch form is arranged, and oblique leg props and side span and canyon topography perfect adaptation, and with surrounding environment coordination, harmonious, consequently this novel stride oblique leg props anti-arched bridge of formula steel purlin greatly is under certain geology, topography condition, is a novel bridge that has structure atress demand and view effect concurrently, has fine application prospect.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a novel stride oblique leg brace formula steel purlin anti-arch bridge greatly, includes that bridging system, steel purlin invert arch system and decking 3, steel purlin invert arch system installs on a set of bridging system, steel purlin invert arch system includes steel purlin owner and encircles piece and steel crossbeam, connects through steel crossbeam between the steel purlin owner encircles the piece, installs decking 3 on steel purlin invert arch system.
The cross bracing system comprises a concrete box girder 1 and an inclined leg bracing 2, the inclined leg bracing 2 and the concrete box girder 1 are installed at an angle of 40-60 degrees, and the concrete box girder 2 and the inclined leg bracing 3 are poured into a stressed whole.
The concrete box girder 1 is a cast-in-place box girder in a double-girder form and consists of a longitudinal girder 1-1 and a transverse girder 1-2, and the longitudinal girder 1-1 is a variable height box girder.
The steel truss main arch sheet is composed of an upper chord 4, a main arch ring 5 and a web member 6, wherein the web member 6 is arranged in a circular arch formed by the upper chord 4 and the main arch ring 5.
The line shape of the main arch ring 5 is a quadratic parabola, and the vector-span ratio is 1/12-1/6.
The steel beam comprises a beam upper chord 7, a beam lower chord 8 and a beam web member 9, and the steel beams are connected through a lower parallel connection 11.
The utility model has the advantages that: 1) the utility model provides a novel stride inclined leg brace formula steel purlin anti-arch bridge novel structure greatly is unique, and the steel construction agrees with concrete structure is perfect, and the outward appearance is succinct smooth, fuses well with natural landscape under special geology, terrain conditions, and will mainly stride the atress structure and arrange the bridge floor in below, not only make the bridge floor field of vision unobstructed, do benefit to the traffic current, and the bridge space feels strong and has certain visual impact force moreover.
2) The main bridge span structure of the novel large-span inclined leg support type steel truss inverted arch bridge provided by the utility model is a steel truss inverted arch system, and the stress system is a simply supported self-anchored system formed by a space truss rod system, so that the stability is good and the rigidity is moderate; the main arch is a truss arch structure formed by steel truss rod pieces, adopts an inverted arch form, can fully play the performance advantages of high-strength materials while reducing the dead weight, and has better economic and technical benefits.
3) The utility model provides a novel stride oblique leg brace formula steel purlin anti-arch bridge greatly, its substructure support system is concrete box girder and the bridging system that the oblique leg brace was pour jointly and become whole and is formed, provides profitable arch and cantilever effect to main span has effectively been reduced. The novel large-span inclined leg support type steel truss reverse arch bridge combines the inclined leg support with the steel truss composite beam structure, the whole bridge structure is linear and bright, and under certain environmental conditions, a novel visual feeling is given to people, and a good landscape effect can be achieved.
Drawings
Fig. 1 is a schematic elevation view of embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of a cross-section of a midspan of embodiment 1 of the present invention;
fig. 3 is a cross-sectional view of the cross-section without a cross beam in the midspan of embodiment 1 of the present invention;
FIG. 4 is a schematic cross-sectional view of a side span concrete box girder according to embodiment 1 of the present invention;
fig. 5 is a schematic plan view of a main span steel truss inverted arch structure according to embodiment 1 of the present invention;
fig. 6 is a schematic elevation view of embodiment 2 of the present invention;
fig. 7 is a schematic plan view of a main span steel truss inverted arch structure according to embodiment 2 of the present invention;
shown in the figure: 1. a concrete box girder; a longitudinal beam 1-1; a cross beam 1-2; 2. a diagonal leg support; 3. a bridge deck; 4. an upper chord; 5. a main arch ring; 6. a web member; 7. a beam upper chord; 8. a beam lower chord; 9. a cross beam web member; 10. web member gusset plates; 11. and (4) lower parallel connection.
Detailed Description
The technical solution of the present invention is further described by the following specific embodiments with reference to the accompanying drawings:
example 1
The utility model provides a novel stride oblique leg brace formula steel purlin anti-arch bridge greatly, this embodiment include concrete box girder 1, oblique leg brace 2, decking 3, upper chord 4, main circle of encircleing 5, web member 6, crossbeam upper chord 7, crossbeam lower chord 8, crossbeam web member 9, web member gusset plate 10 and lower tie 11, as shown in fig. 1 ~ 5.
Novel stride oblique leg brace formula steel purlin anti-arch bridge greatly generally is applicable to the good V-arrangement valley of geology situation, and the clearance under the bridge is enough, does not influence navigation. In the embodiment, the total length of the novel large-span inclined leg support type steel truss inverted arch bridge is 150m, the main span is a steel truss inverted arch structure with 75m, concrete box girders integrated with inclined leg supports are arranged on two sides of a main arch, and the length of each box girder is 37.5 m.
This embodiment the novel supporter system of striding inclined leg brace formula steel truss anti-arch bridge greatly is the bridging system that concrete box girder 1 and inclined leg brace 2 are constituteed, and the inclination of inclined leg brace 2 changes according to the topography difference, and this embodiment inclined leg brace 2 is 52 with the contained angle of concrete box girder 1.
The concrete box girder 1 is a cast-in-place box girder in a double-girder form and consists of a longitudinal girder 1-1 and a transverse girder 1-2, wherein the longitudinal girder 1-1 is a variable-height box girder, the height of the girder end is 2.3m, and the height of the girder at the joint of the diagonal bracing 2 is 3.5m, as shown in FIG. 4; the cross section of the inclined leg support 2 is a rectangular box-type cross section, the inclined leg support and the concrete box girder 1 are cast into a stressed whole in a cast-in-place mode during construction, and a bracket structure is arranged at the top of the inclined leg support 2 and used for erecting a steel truss main arch.
The main bridge span structure of the novel large-span inclined leg bracing type steel truss inverted arch bridge is a steel truss inverted arch system, and the main steel truss arch sheet is composed of an upper chord 4, a main arch ring 5 and web members 6, and then a space truss arch type stress structure formed by connecting two steel truss main arch sheets through a steel cross beam. The upper chord 4 is connected with the bridge deck 3 by shear nails.
The upper chord 4 and the main arch ring 5 are welded rectangular sections, the section size is 700 multiplied by 500mm, the line shape of the main arch ring 5 adopts a quadratic parabola, the rise of the main arch is 12m, and the rise-span ratio is 1/6.25.
The web members 6 are in a triangular form and symmetrically arranged on two sides by taking the arch crown as a center, the included angle between every two adjacent web members is 48.5 degrees, the section of each web member 6 is in a welding rectangle shape, the section size of each web member is 700 multiplied by 700mm, the length of each web member 6 is changed according to the rise change of the main arch ring 5, and the length range of each web member is 7.5-12 m.
In this embodiment the steel beam of the steel truss inverted arch system is composed of a beam upper chord 7, a beam lower chord 8 and a beam web member 9, the arrangement of the steel beam corresponds to the web member 6, namely the steel beam is arranged between the web members corresponding to the steel truss main arch sheets on the two sides, and the arrangement number of the steel beam is the same as the number of the web members 6 on the main arch sheets.
The cross section of the beam upper chord 7 and the cross section of the beam lower chord 8 are in the form of welding rectangles, the cross section size of the beam upper chord 7 and the cross section size of the beam lower chord 8 are 500 multiplied by 500mm, the cross section form of the beam web member 9 is welding H-shaped steel, the specification model of the beam web member is HW500X500X14X16, and the beam web member 9 is welded with the beam upper chord 7 and the beam lower chord 8.
The arrangement form of the beam web members 9 is a cross type, the length and the crossing angle of the beam web members 9 are related to the rise of the main arch ring and are changed according to the change of the rise, and the beam web members 9 are connected at the cross position through a web member node plate 10.
In this embodiment, the steel beams of the steel truss inverted arch system are connected through a lower parallel connection 11, the arrangement form of the lower parallel connection 11 is a symmetrical inverted triangular form, two adjacent steel beams are connected, the lower parallel connection 11 is welded H-shaped steel, and the specification model of the lower parallel connection 11 is HW300X 10X 14.
The bridge deck 3 of the embodiment is a bridge deck structure erected on a steel truss main arch structure, the bridge deck is made of C50 concrete, and the bridge deck is thickened to form transverse beam ribs on a cross section of a beam, as shown in FIG. 2; the joints of the cross sections without the cross beams and the main arch pieces are arranged in an inverted triangle, as shown in figure 3.
The construction method of the novel large-span inclined leg support type steel truss reverse arch bridge comprises the following steps:
1. each rod piece of the steel truss main arch structure is manufactured in a factory; after the inspection is qualified, transporting the steel plate to a bridge site or a construction site storage place;
2. constructing a foundation ground anchor, and arranging a pull rod to be connected with the concrete box girder; pouring the diagonal leg support and the concrete box girder in situ, and pouring the cantilever end to form a stressed whole;
3. welding the upper chord member, the main arch rings and the web members to form plane main arch pieces on a construction site, respectively hoisting and erecting the two plane main arch pieces at the corbels of the inclined leg support by using an underbridge hoisting facility or a bridge deck hoisting facility, and adopting temporary fixed support; hoisting the steel beam between the planar main arch pieces and welding the steel beam with the main arch pieces; hoisting and connecting the steel cross beams by a lower parallel connection;
4. pouring a bridge deck on the steel truss main arch; removing the temporary fixed support to enable the steel truss main arch to be in a simply supported stress state; and constructing other accessory facilities.
Example 2
The utility model provides a novel stride oblique leg brace formula steel truss anti-arch bridge greatly, this embodiment change the web member that the steel truss owner encircleed on embodiment 1's basis and arrange the form for vertical formula, and the cross-sectional form that changes the oblique leg brace is board-like, including concrete box girder 1, oblique leg brace 2, decking 3, upper chord 4, main arch ring 5, web member 6, crossbeam upper chord 7, crossbeam lower chord 8, crossbeam web member 9, web member gusset plate 10 and lower platoon 11, as shown in fig. 6 ~ 7.
Novel stride oblique leg brace formula steel purlin anti-arch bridge greatly generally is applicable to the good V-arrangement valley of geology situation, and the clearance under the bridge is enough, does not influence navigation. In the embodiment, the total length of the novel large-span inclined leg support type steel truss inverted arch bridge is 150m, the main span is a steel truss inverted arch structure with 75m, concrete box girders integrated with inclined leg supports are arranged on two sides of a main arch, and the length of each box girder is 37.5 m.
This embodiment the novel supporter system of striding inclined leg brace formula steel truss anti-arch bridge greatly is the bridging system that concrete box girder 1 and inclined leg brace 2 are constituteed, and the inclination of inclined leg brace 2 changes according to the topography difference, and this embodiment inclined leg brace 2 is 52 with the contained angle of concrete box girder 1.
The concrete box girder 1 is a cast-in-place box girder in a double-girder form and consists of a longitudinal girder 1-1 and a transverse girder 1-2, wherein the longitudinal girder 1-1 is a variable-height box girder, the height of the girder end is 2.3m, and the height of the girder at the joint of the diagonal leg brace 2 is 3.5m, as shown in figure 4; the cross section of the inclined leg support 2 is in a solid web rectangular plate type, the inclined leg support and the concrete box girder 1 are cast into a stressed whole in a cast-in-place mode during construction, and a bracket structure is arranged at the top of the inclined leg support 2 and used for erecting a steel truss main arch.
The main bridge span structure of the novel large-span inclined leg bracing type steel truss inverted arch bridge is a steel truss inverted arch system, and the main steel truss arch sheet is composed of an upper chord 4, a main arch ring 5 and web members 6, and then a space truss arch type stress structure formed by connecting two steel truss main arch sheets through a steel cross beam. The upper chord 4 is connected with the bridge deck 3 by shear nails.
The upper chord 4 and the main arch ring 5 are welded rectangular sections, the section size is 700 multiplied by 500mm, the line shape of the main arch ring 5 adopts a quadratic parabola, the rise of the main arch is 12m, and the rise-span ratio is 1/6.25.
The web members 6 are vertical and symmetrically arranged on two sides by taking the arch crown as a center, the distance between every two adjacent web members is 7.5m, the section of each web member 6 is a welding rectangle, the section size of each web member is 700 multiplied by 600mm, the length of each web member 6 is changed according to the rise change of the main arch ring 5, and the length range of each web member is 7.5-12 m.
In this embodiment the steel beam of the steel truss inverted arch system is composed of a beam upper chord 7, a beam lower chord 8 and a beam web member 9, the arrangement of the steel beam corresponds to the web member 6, namely the steel beam is arranged between the web members corresponding to the two steel truss main arch pieces, and the steel beam is vertically arranged and connected to the vertical web member of the main arch.
The cross section of the beam upper chord 7 and the cross section of the beam lower chord 8 are in the form of welding rectangles, the cross section size of the beam upper chord 7 and the cross section size of the beam lower chord 8 are 500 multiplied by 500mm, the cross section form of the beam web member 9 is welding H-shaped steel, the specification model of the beam web member is HW500X500X14X16, and the beam web member 9 is welded with the beam upper chord 7 and the beam lower chord 8.
The arrangement form of the beam web members 9 is a cross type, the length and the crossing angle of the beam web members 9 are related to the rise of the main arch ring and are changed according to the change of the rise, and the beam web members 9 are connected at the cross position through a web member node plate 10.
In this embodiment, the steel beams of the steel truss inverted arch system are connected through the lower parallel connection 11, the arrangement form of the lower parallel connection 11 is a cross type, and the two adjacent steel beams are connected, as shown in fig. 7, the lower parallel connection 11 is welded H-shaped steel, and the specification model of the lower parallel connection 11 is HW300X 10X 14.
The bridge deck 3 of this embodiment is a bridge deck structure erected on a steel truss main arch structure, the material of the bridge deck is UHPC (ultra high performance concrete), and the bridge deck is thickened to form transverse beam ribs on a cross section with beams, as shown in fig. 2; the joints of the cross sections without the cross beams and the main arch pieces are arranged in an inverted triangle, as shown in figure 3. The UHPC can obviously improve the structural strength of the bridge deck slab, so that the durability of the bridge is improved.
The construction method of the novel large-span inclined leg support type steel truss reverse arch bridge comprises the following steps:
1. each rod piece of the steel truss main arch structure is manufactured in a factory; after the inspection is qualified, transporting the steel plate to a bridge site or a construction site storage place;
2. constructing a foundation ground anchor, and arranging a pull rod to be connected with the concrete box girder; pouring the diagonal leg support and the concrete box girder in situ, and pouring the cantilever end to form a stressed whole;
3. welding the upper chord member, the main arch rings and the web members to form plane main arch pieces on a construction site, respectively hoisting and erecting the two plane main arch pieces at the corbels of the inclined leg support by using an underbridge hoisting facility or a bridge deck hoisting facility, and adopting temporary fixed support; hoisting the steel beam between the planar main arch pieces and welding the steel beam with the main arch pieces; hoisting and connecting the steel cross beams by a lower parallel connection;
4. pouring a UHPC bridge deck on the steel truss main arch; removing the temporary fixed support to enable the steel truss main arch to be in a simply supported stress state; and constructing other accessory facilities.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a novel stride oblique leg props anti-arch bridge of formula steel purlin greatly, includes that bridging system, steel purlin are anti-arch system and decking, its characterized in that: the steel truss inverted arch system is arranged on a set of shear support system and comprises steel truss main arch sheets and steel beams, the steel truss main arch sheets are connected through the steel beams, and the steel truss inverted arch system is provided with a bridge deck.
2. The novel large-span inclined leg bracing type steel truss reverse arch bridge as claimed in claim 1, wherein: the cross brace system comprises a concrete box girder and an inclined leg brace, the inclined leg brace and the concrete box girder are installed at an angle of 40-60 degrees, and the concrete box girder and the inclined leg brace are cast into a stressed whole.
3. The novel large-span inclined leg bracing type steel truss reverse arch bridge as claimed in claim 2, wherein: the concrete box girder is a cast-in-place box girder in a double-girder form and consists of a longitudinal girder and a cross girder, and the longitudinal girder is a height-variable box girder.
4. The novel large-span inclined leg bracing type steel truss reverse arch bridge as claimed in claim 1, wherein: the steel truss main arch sheet is composed of an upper chord, a main arch ring and a web member, wherein the web member is arranged in a circular arch formed by the upper chord and the main arch ring.
5. The novel large-span inclined leg bracing type steel truss reverse arch bridge as claimed in claim 4, wherein: the main arch ring line is a quadratic parabola, and the vector-span ratio is 1/12-1/6.
6. The novel large-span inclined leg bracing type steel truss reverse arch bridge as claimed in claim 1, wherein: the steel beam comprises a beam upper chord, a beam lower chord and a beam web member, and the steel beams are connected through a lower parallel connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020483030.3U CN212375686U (en) | 2020-04-03 | 2020-04-03 | Novel long-span inclined leg support type steel truss inverted arch bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673066A (en) * | 2022-03-24 | 2022-06-28 | 四川蜀道新制式轨道集团有限责任公司 | Ground anchor type inclined leg rigid frame bridge and construction method thereof |
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2020
- 2020-04-03 CN CN202020483030.3U patent/CN212375686U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673066A (en) * | 2022-03-24 | 2022-06-28 | 四川蜀道新制式轨道集团有限责任公司 | Ground anchor type inclined leg rigid frame bridge and construction method thereof |
| CN114673066B (en) * | 2022-03-24 | 2023-09-19 | 四川蜀道新制式轨道集团有限责任公司 | Ground anchor type inclined leg rigid frame bridge and construction method thereof |
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